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3863585b WD |
1 | /* |
2 | * (C) Copyright 2001 | |
3 | * Denis Peter, MPL AG, d.peter@mpl.ch. | |
4 | * | |
5 | * See file CREDITS for list of people who contributed to this | |
6 | * project. | |
7 | * | |
8 | * This program is free software; you can redistribute it and/or | |
9 | * modify it under the terms of the GNU General Public License as | |
10 | * published by the Free Software Foundation; either version 2 of | |
11 | * the License, or (at your option) any later version. | |
12 | * | |
13 | * This program is distributed in the hope that it will be useful, | |
14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | * GNU General Public License for more details. | |
17 | * | |
18 | * You should have received a copy of the GNU General Public License | |
19 | * along with this program; if not, write to the Free Software | |
20 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, | |
21 | * MA 02111-1307 USA | |
22 | * | |
23 | */ | |
24 | /* | |
25 | * Floppy Disk support | |
26 | */ | |
27 | ||
28 | #include <common.h> | |
29 | #include <config.h> | |
30 | #include <command.h> | |
31 | #include <image.h> | |
32 | ||
33 | ||
34 | #undef FDC_DEBUG | |
35 | ||
36 | #ifdef FDC_DEBUG | |
37 | #define PRINTF(fmt,args...) printf (fmt ,##args) | |
38 | #else | |
39 | #define PRINTF(fmt,args...) | |
40 | #endif | |
41 | ||
42 | #ifndef TRUE | |
43 | #define TRUE 1 | |
44 | #endif | |
45 | #ifndef FALSE | |
46 | #define FALSE 0 | |
47 | #endif | |
48 | ||
49 | ||
50 | #if (CONFIG_COMMANDS & CFG_CMD_DATE) | |
51 | #include <rtc.h> | |
52 | #endif | |
53 | ||
54 | #if (CONFIG_COMMANDS & CFG_CMD_FDC) | |
55 | ||
56 | ||
57 | typedef struct { | |
58 | int flags; /* connected drives ect */ | |
59 | unsigned long blnr; /* Logical block nr */ | |
60 | uchar drive; /* drive no */ | |
61 | uchar cmdlen; /* cmd length */ | |
62 | uchar cmd[16]; /* cmd desc */ | |
63 | uchar dma; /* if > 0 dma enabled */ | |
64 | uchar result[11];/* status information */ | |
65 | uchar resultlen; /* lenght of result */ | |
66 | } FDC_COMMAND_STRUCT; | |
67 | /* flags: only the lower 8bit used: | |
68 | * bit 0 if set drive 0 is present | |
69 | * bit 1 if set drive 1 is present | |
70 | * bit 2 if set drive 2 is present | |
71 | * bit 3 if set drive 3 is present | |
72 | * bit 4 if set disk in drive 0 is inserted | |
73 | * bit 5 if set disk in drive 1 is inserted | |
74 | * bit 6 if set disk in drive 2 is inserted | |
75 | * bit 7 if set disk in drive 4 is inserted | |
76 | */ | |
77 | ||
78 | ||
79 | /* cmd indexes */ | |
80 | #define COMMAND 0 | |
81 | #define DRIVE 1 | |
82 | #define CONFIG0 1 | |
83 | #define SPEC_HUTSRT 1 | |
84 | #define TRACK 2 | |
85 | #define CONFIG1 2 | |
86 | #define SPEC_HLT 2 | |
87 | #define HEAD 3 | |
88 | #define CONFIG2 3 | |
89 | #define SECTOR 4 | |
90 | #define SECTOR_SIZE 5 | |
91 | #define LAST_TRACK 6 | |
92 | #define GAP 7 | |
93 | #define DTL 8 | |
94 | /* result indexes */ | |
95 | #define STATUS_0 0 | |
96 | #define STATUS_PCN 1 | |
97 | #define STATUS_1 1 | |
98 | #define STATUS_2 2 | |
99 | #define STATUS_TRACK 3 | |
100 | #define STATUS_HEAD 4 | |
101 | #define STATUS_SECT 5 | |
102 | #define STATUS_SECT_SIZE 6 | |
103 | ||
104 | ||
105 | /* Register addresses */ | |
106 | #define FDC_BASE 0x3F0 | |
107 | #define FDC_SRA FDC_BASE + 0 /* Status Register A */ | |
108 | #define FDC_SRB FDC_BASE + 1 /* Status Register B */ | |
109 | #define FDC_DOR FDC_BASE + 2 /* Digital Output Register */ | |
110 | #define FDC_TDR FDC_BASE + 3 /* Tape Drive Register */ | |
111 | #define FDC_DSR FDC_BASE + 4 /* Data rate Register */ | |
112 | #define FDC_MSR FDC_BASE + 4 /* Main Status Register */ | |
113 | #define FDC_FIFO FDC_BASE + 5 /* FIFO */ | |
114 | #define FDC_DIR FDC_BASE + 6 /* Digital Input Register */ | |
115 | #define FDC_CCR FDC_BASE + 7 /* Configuration Control */ | |
116 | /* Commands */ | |
117 | #define FDC_CMD_SENSE_INT 0x08 | |
118 | #define FDC_CMD_CONFIGURE 0x13 | |
119 | #define FDC_CMD_SPECIFY 0x03 | |
120 | #define FDC_CMD_RECALIBRATE 0x07 | |
121 | #define FDC_CMD_READ 0x06 | |
122 | #define FDC_CMD_READ_TRACK 0x02 | |
123 | #define FDC_CMD_READ_ID 0x0A | |
124 | #define FDC_CMD_DUMP_REG 0x0E | |
125 | #define FDC_CMD_SEEK 0x0F | |
126 | ||
127 | #define FDC_CMD_SENSE_INT_LEN 0x01 | |
128 | #define FDC_CMD_CONFIGURE_LEN 0x04 | |
129 | #define FDC_CMD_SPECIFY_LEN 0x03 | |
130 | #define FDC_CMD_RECALIBRATE_LEN 0x02 | |
131 | #define FDC_CMD_READ_LEN 0x09 | |
132 | #define FDC_CMD_READ_TRACK_LEN 0x09 | |
133 | #define FDC_CMD_READ_ID_LEN 0x02 | |
134 | #define FDC_CMD_DUMP_REG_LEN 0x01 | |
135 | #define FDC_CMD_SEEK_LEN 0x03 | |
136 | ||
137 | #define FDC_FIFO_THR 0x0C | |
138 | #define FDC_FIFO_DIS 0x00 | |
139 | #define FDC_IMPLIED_SEEK 0x01 | |
140 | #define FDC_POLL_DIS 0x00 | |
141 | #define FDC_PRE_TRK 0x00 | |
142 | #define FDC_CONFIGURE FDC_FIFO_THR | (FDC_POLL_DIS<<4) | (FDC_FIFO_DIS<<5) | (FDC_IMPLIED_SEEK << 6) | |
143 | #define FDC_MFM_MODE 0x01 /* MFM enable */ | |
144 | #define FDC_SKIP_MODE 0x00 /* skip enable */ | |
145 | ||
146 | #define FDC_TIME_OUT 100000 /* time out */ | |
147 | #define FDC_RW_RETRIES 3 /* read write retries */ | |
148 | #define FDC_CAL_RETRIES 3 /* calibration and seek retries */ | |
149 | ||
150 | ||
151 | /* Disk structure */ | |
152 | typedef struct { | |
153 | unsigned int size; /* nr of sectors total */ | |
154 | unsigned int sect; /* sectors per track */ | |
155 | unsigned int head; /* nr of heads */ | |
156 | unsigned int track; /* nr of tracks */ | |
157 | unsigned int stretch; /* !=0 means double track steps */ | |
158 | unsigned char gap; /* gap1 size */ | |
159 | unsigned char rate; /* data rate. |= 0x40 for perpendicular */ | |
160 | unsigned char spec1; /* stepping rate, head unload time */ | |
161 | unsigned char fmt_gap; /* gap2 size */ | |
162 | unsigned char hlt; /* head load time */ | |
163 | unsigned char sect_code; /* Sector Size code */ | |
164 | const char * name; /* used only for predefined formats */ | |
165 | } FD_GEO_STRUCT; | |
166 | ||
167 | ||
168 | /* supported Floppy types (currently only one) */ | |
169 | const static FD_GEO_STRUCT floppy_type[2] = { | |
170 | { 2880,18,2,80,0,0x1B,0x00,0xCF,0x6C,16,2,"H1440" }, /* 7 1.44MB 3.5" */ | |
171 | { 0, 0,0, 0,0,0x00,0x00,0x00,0x00, 0,0,NULL }, /* end of table */ | |
172 | }; | |
173 | ||
174 | static FDC_COMMAND_STRUCT cmd; /* global command struct */ | |
175 | ||
7f6c2cbc WD |
176 | /* If the boot drive number is undefined, we assume it's drive 0 */ |
177 | #ifndef CFG_FDC_DRIVE_NUMBER | |
178 | #define CFG_FDC_DRIVE_NUMBER 0 | |
179 | #endif | |
180 | ||
181 | /* Hardware access */ | |
182 | #ifndef CFG_ISA_IO_STRIDE | |
183 | #define CFG_ISA_IO_STRIDE 1 | |
184 | #endif | |
185 | ||
186 | #ifndef CFG_ISA_IO_OFFSET | |
187 | #define CFG_ISA_IO_OFFSET 0 | |
188 | #endif | |
189 | ||
190 | ||
3863585b WD |
191 | /* Supporting Functions */ |
192 | /* reads a Register of the FDC */ | |
193 | unsigned char read_fdc_reg(unsigned int addr) | |
194 | { | |
7f6c2cbc WD |
195 | volatile unsigned char *val = (volatile unsigned char *)(CFG_ISA_IO_BASE_ADDRESS + (addr * CFG_ISA_IO_STRIDE) + CFG_ISA_IO_OFFSET); |
196 | ||
197 | return val [0]; | |
3863585b WD |
198 | } |
199 | ||
200 | /* writes a Register of the FDC */ | |
201 | void write_fdc_reg(unsigned int addr, unsigned char val) | |
202 | { | |
7f6c2cbc WD |
203 | volatile unsigned char *tmp = (volatile unsigned char *)(CFG_ISA_IO_BASE_ADDRESS + (addr * CFG_ISA_IO_STRIDE) + CFG_ISA_IO_OFFSET); |
204 | tmp[0]=val; | |
3863585b WD |
205 | } |
206 | ||
207 | /* waits for an interrupt (polling) */ | |
208 | int wait_for_fdc_int(void) | |
209 | { | |
210 | unsigned long timeout; | |
211 | timeout = FDC_TIME_OUT; | |
212 | while((read_fdc_reg(FDC_SRA)&0x80)==0) { | |
213 | timeout--; | |
214 | udelay(10); | |
215 | if(timeout==0) /* timeout occured */ | |
216 | return FALSE; | |
217 | } | |
218 | return TRUE; | |
219 | } | |
220 | ||
221 | ||
222 | /* reads a byte from the FIFO of the FDC and checks direction and RQM bit | |
223 | of the MSR. returns -1 if timeout, or byte if ok */ | |
224 | int read_fdc_byte(void) | |
225 | { | |
226 | unsigned long timeout; | |
227 | timeout = FDC_TIME_OUT; | |
228 | while((read_fdc_reg(FDC_MSR)&0xC0)!=0xC0) { | |
229 | /* direction out and ready */ | |
230 | udelay(10); | |
231 | timeout--; | |
232 | if(timeout==0) /* timeout occured */ | |
233 | return -1; | |
234 | } | |
235 | return read_fdc_reg(FDC_FIFO); | |
236 | } | |
237 | ||
238 | /* if the direction of the FIFO is wrong, this routine is used to | |
239 | empty the FIFO. Should _not_ be used */ | |
240 | int fdc_need_more_output(void) | |
241 | { | |
242 | unsigned char c; | |
243 | while((read_fdc_reg(FDC_MSR)&0xC0)==0xC0) { | |
244 | c=(unsigned char)read_fdc_byte(); | |
245 | printf("Error: more output: %x\n",c); | |
246 | } | |
247 | return TRUE; | |
248 | } | |
249 | ||
250 | ||
251 | /* writes a byte to the FIFO of the FDC and checks direction and RQM bit | |
252 | of the MSR */ | |
253 | int write_fdc_byte(unsigned char val) | |
254 | { | |
255 | unsigned long timeout; | |
256 | timeout = FDC_TIME_OUT; | |
257 | while((read_fdc_reg(FDC_MSR)&0xC0)!=0x80) { | |
258 | /* direction in and ready for byte */ | |
259 | timeout--; | |
260 | udelay(10); | |
261 | fdc_need_more_output(); | |
262 | if(timeout==0) /* timeout occured */ | |
263 | return FALSE; | |
264 | } | |
265 | write_fdc_reg(FDC_FIFO,val); | |
266 | return TRUE; | |
267 | } | |
268 | ||
269 | /* sets up all FDC commands and issues it to the FDC. If | |
270 | the command causes direct results (no Execution Phase) | |
271 | the result is be read as well. */ | |
272 | ||
273 | int fdc_issue_cmd(FDC_COMMAND_STRUCT *pCMD,FD_GEO_STRUCT *pFG) | |
274 | { | |
275 | int i; | |
276 | unsigned long head,track,sect,timeout; | |
277 | track = pCMD->blnr / (pFG->sect * pFG->head); /* track nr */ | |
278 | sect = pCMD->blnr % (pFG->sect * pFG->head); /* remaining blocks */ | |
279 | head = sect / pFG->sect; /* head nr */ | |
280 | sect = sect % pFG->sect; /* remaining blocks */ | |
281 | sect++; /* sectors are 1 based */ | |
7f6c2cbc WD |
282 | PRINTF("Cmd 0x%02x Track %ld, Head %ld, Sector %ld, Drive %d (blnr %ld)\n",pCMD->cmd[0],track,head,sect,pCMD->drive,pCMD->blnr); |
283 | ||
3863585b WD |
284 | if(head|=0) { /* max heads = 2 */ |
285 | pCMD->cmd[DRIVE]=pCMD->drive | 0x04; /* head 1 */ | |
286 | pCMD->cmd[HEAD]=(unsigned char) head; /* head register */ | |
287 | } | |
288 | else { | |
289 | pCMD->cmd[DRIVE]=pCMD->drive; /* head 0 */ | |
290 | pCMD->cmd[HEAD]=(unsigned char) head; /* head register */ | |
291 | } | |
292 | pCMD->cmd[TRACK]=(unsigned char) track; /* track */ | |
293 | switch (pCMD->cmd[COMMAND]) { | |
294 | case FDC_CMD_READ: | |
295 | pCMD->cmd[SECTOR]=(unsigned char) sect; /* sector */ | |
296 | pCMD->cmd[SECTOR_SIZE]=pFG->sect_code; /* sector size code */ | |
297 | pCMD->cmd[LAST_TRACK]=pFG->sect; /* End of track */ | |
298 | pCMD->cmd[GAP]=pFG->gap; /* gap */ | |
299 | pCMD->cmd[DTL]=0xFF; /* DTL */ | |
300 | pCMD->cmdlen=FDC_CMD_READ_LEN; | |
301 | pCMD->cmd[COMMAND]|=(FDC_MFM_MODE<<6); /* set MFM bit */ | |
302 | pCMD->cmd[COMMAND]|=(FDC_SKIP_MODE<<5); /* set Skip bit */ | |
303 | pCMD->resultlen=0; /* result only after execution */ | |
304 | break; | |
305 | case FDC_CMD_SEEK: | |
306 | pCMD->cmdlen=FDC_CMD_SEEK_LEN; | |
307 | pCMD->resultlen=0; /* no result */ | |
308 | break; | |
309 | case FDC_CMD_CONFIGURE: | |
310 | pCMD->cmd[CONFIG0]=0; | |
311 | pCMD->cmd[CONFIG1]=FDC_CONFIGURE; /* FIFO Threshold, Poll, Enable FIFO */ | |
312 | pCMD->cmd[CONFIG2]=FDC_PRE_TRK; /* Precompensation Track */ | |
313 | pCMD->cmdlen=FDC_CMD_CONFIGURE_LEN; | |
314 | pCMD->resultlen=0; /* no result */ | |
315 | break; | |
316 | case FDC_CMD_SPECIFY: | |
317 | pCMD->cmd[SPEC_HUTSRT]=pFG->spec1; | |
318 | pCMD->cmd[SPEC_HLT]=(pFG->hlt)<<1; /* head load time */ | |
319 | if(pCMD->dma==0) | |
320 | pCMD->cmd[SPEC_HLT]|=0x1; /* no dma */ | |
321 | pCMD->cmdlen=FDC_CMD_SPECIFY_LEN; | |
322 | pCMD->resultlen=0; /* no result */ | |
323 | break; | |
324 | case FDC_CMD_DUMP_REG: | |
325 | pCMD->cmdlen=FDC_CMD_DUMP_REG_LEN; | |
326 | pCMD->resultlen=10; /* 10 byte result */ | |
327 | break; | |
328 | case FDC_CMD_READ_ID: | |
329 | pCMD->cmd[COMMAND]|=(FDC_MFM_MODE<<6); /* set MFM bit */ | |
330 | pCMD->cmdlen=FDC_CMD_READ_ID_LEN; | |
331 | pCMD->resultlen=7; /* 7 byte result */ | |
332 | break; | |
333 | case FDC_CMD_RECALIBRATE: | |
334 | pCMD->cmd[DRIVE]&=0x03; /* don't set the head bit */ | |
335 | pCMD->cmdlen=FDC_CMD_RECALIBRATE_LEN; | |
336 | pCMD->resultlen=0; /* no result */ | |
337 | break; | |
338 | break; | |
339 | case FDC_CMD_SENSE_INT: | |
340 | pCMD->cmdlen=FDC_CMD_SENSE_INT_LEN; | |
341 | pCMD->resultlen=2; | |
342 | break; | |
343 | } | |
344 | for(i=0;i<pCMD->cmdlen;i++) { | |
345 | /* PRINTF("write cmd%d = 0x%02X\n",i,pCMD->cmd[i]); */ | |
346 | if(write_fdc_byte(pCMD->cmd[i])==FALSE) { | |
347 | PRINTF("Error: timeout while issue cmd%d\n",i); | |
348 | return FALSE; | |
349 | } | |
350 | } | |
351 | timeout=FDC_TIME_OUT; | |
352 | for(i=0;i<pCMD->resultlen;i++) { | |
353 | while((read_fdc_reg(FDC_MSR)&0xC0)!=0xC0) { | |
354 | timeout--; | |
355 | if(timeout==0) { | |
356 | PRINTF(" timeout while reading result%d MSR=0x%02X\n",i,read_fdc_reg(FDC_MSR)); | |
357 | return FALSE; | |
358 | } | |
359 | } | |
360 | pCMD->result[i]=(unsigned char)read_fdc_byte(); | |
361 | } | |
362 | return TRUE; | |
363 | } | |
364 | ||
365 | /* selects the drive assigned in the cmd structur and | |
366 | switches on the Motor */ | |
367 | void select_fdc_drive(FDC_COMMAND_STRUCT *pCMD) | |
368 | { | |
369 | unsigned char val; | |
370 | ||
371 | val=(1<<(4+pCMD->drive))|pCMD->drive|0xC; /* set reset, dma gate and motor bits */ | |
372 | if((read_fdc_reg(FDC_DOR)&val)!=val) { | |
373 | write_fdc_reg(FDC_DOR,val); | |
374 | for(val=0;val<255;val++) | |
375 | udelay(500); /* wait some time to start motor */ | |
376 | } | |
377 | } | |
378 | ||
379 | /* switches off the Motor of the specified drive */ | |
380 | void stop_fdc_drive(FDC_COMMAND_STRUCT *pCMD) | |
381 | { | |
382 | unsigned char val; | |
383 | ||
384 | val=(1<<(4+pCMD->drive))|pCMD->drive; /* sets motor bits */ | |
385 | write_fdc_reg(FDC_DOR,(read_fdc_reg(FDC_DOR)&~val)); | |
386 | } | |
387 | ||
388 | /* issues a recalibrate command, waits for interrupt and | |
389 | * issues a sense_interrupt */ | |
390 | int fdc_recalibrate(FDC_COMMAND_STRUCT *pCMD,FD_GEO_STRUCT *pFG) | |
391 | { | |
392 | pCMD->cmd[COMMAND]=FDC_CMD_RECALIBRATE; | |
393 | if(fdc_issue_cmd(pCMD,pFG)==FALSE) | |
394 | return FALSE; | |
395 | while(wait_for_fdc_int()!=TRUE); | |
396 | pCMD->cmd[COMMAND]=FDC_CMD_SENSE_INT; | |
397 | return(fdc_issue_cmd(pCMD,pFG)); | |
398 | } | |
399 | ||
400 | /* issues a recalibrate command, waits for interrupt and | |
401 | * issues a sense_interrupt */ | |
402 | int fdc_seek(FDC_COMMAND_STRUCT *pCMD,FD_GEO_STRUCT *pFG) | |
403 | { | |
404 | pCMD->cmd[COMMAND]=FDC_CMD_SEEK; | |
405 | if(fdc_issue_cmd(pCMD,pFG)==FALSE) | |
406 | return FALSE; | |
407 | while(wait_for_fdc_int()!=TRUE); | |
408 | pCMD->cmd[COMMAND]=FDC_CMD_SENSE_INT; | |
409 | return(fdc_issue_cmd(pCMD,pFG)); | |
410 | } | |
411 | ||
412 | ||
413 | /* terminates current command, by not servicing the FIFO | |
414 | * waits for interrupt and fills in the result bytes */ | |
415 | int fdc_terminate(FDC_COMMAND_STRUCT *pCMD) | |
416 | { | |
417 | int i; | |
418 | for(i=0;i<100;i++) | |
419 | udelay(500); /* wait 500usec for fifo overrun */ | |
420 | while((read_fdc_reg(FDC_SRA)&0x80)==0x00); /* wait as long as no int has occured */ | |
421 | for(i=0;i<7;i++) { | |
422 | pCMD->result[i]=(unsigned char)read_fdc_byte(); | |
423 | } | |
424 | return TRUE; | |
425 | } | |
426 | ||
427 | /* reads data from FDC, seek commands are issued automatic */ | |
428 | int fdc_read_data(unsigned char *buffer, unsigned long blocks,FDC_COMMAND_STRUCT *pCMD, FD_GEO_STRUCT *pFG) | |
429 | { | |
430 | /* first seek to start address */ | |
431 | unsigned long len,lastblk,readblk,i,timeout,ii,offset; | |
432 | unsigned char pcn,c,retriesrw,retriescal; | |
433 | unsigned char *bufferw; /* working buffer */ | |
434 | int sect_size; | |
435 | int flags; | |
436 | ||
437 | flags=disable_interrupts(); /* switch off all Interrupts */ | |
438 | select_fdc_drive(pCMD); /* switch on drive */ | |
439 | sect_size=0x080<<pFG->sect_code; | |
440 | retriesrw=0; | |
441 | retriescal=0; | |
442 | offset=0; | |
443 | if(fdc_seek(pCMD,pFG)==FALSE) { | |
444 | stop_fdc_drive(pCMD); | |
445 | enable_interrupts(); | |
446 | return FALSE; | |
447 | } | |
448 | if((pCMD->result[STATUS_0]&0x20)!=0x20) { | |
449 | printf("Seek error Status: %02X\n",pCMD->result[STATUS_0]); | |
450 | stop_fdc_drive(pCMD); | |
451 | enable_interrupts(); | |
452 | return FALSE; | |
453 | } | |
454 | pcn=pCMD->result[STATUS_PCN]; /* current track */ | |
455 | /* now determine the next seek point */ | |
456 | lastblk=pCMD->blnr + blocks; | |
457 | /* readblk=(pFG->head*pFG->sect)-(pCMD->blnr%(pFG->head*pFG->sect)); */ | |
458 | readblk=pFG->sect-(pCMD->blnr%pFG->sect); | |
459 | PRINTF("1st nr of block possible read %ld start %ld\n",readblk,pCMD->blnr); | |
460 | if(readblk>blocks) /* is end within 1st track */ | |
461 | readblk=blocks; /* yes, correct it */ | |
462 | PRINTF("we read %ld blocks start %ld\n",readblk,pCMD->blnr); | |
463 | bufferw=&buffer[0]; /* setup working buffer */ | |
464 | do { | |
465 | retryrw: | |
466 | len=sect_size * readblk; | |
467 | pCMD->cmd[COMMAND]=FDC_CMD_READ; | |
468 | if(fdc_issue_cmd(pCMD,pFG)==FALSE) { | |
469 | stop_fdc_drive(pCMD); | |
470 | enable_interrupts(); | |
471 | return FALSE; | |
472 | } | |
473 | for (i=0;i<len;i++) { | |
474 | timeout=FDC_TIME_OUT; | |
475 | do { | |
476 | c=read_fdc_reg(FDC_MSR); | |
477 | if((c&0xC0)==0xC0) { | |
478 | bufferw[i]=read_fdc_reg(FDC_FIFO); | |
479 | break; | |
480 | } | |
481 | if((c&0xC0)==0x80) { /* output */ | |
482 | PRINTF("Transfer error transfered: at %ld, MSR=%02X\n",i,c); | |
483 | if(i>6) { | |
484 | for(ii=0;ii<7;ii++) { | |
485 | pCMD->result[ii]=bufferw[(i-7+ii)]; | |
486 | } /* for */ | |
487 | } | |
488 | if(retriesrw++>FDC_RW_RETRIES) { | |
489 | if (retriescal++>FDC_CAL_RETRIES) { | |
490 | stop_fdc_drive(pCMD); | |
491 | enable_interrupts(); | |
492 | return FALSE; | |
493 | } | |
494 | else { | |
495 | PRINTF(" trying to recalibrate Try %d\n",retriescal); | |
496 | if(fdc_recalibrate(pCMD,pFG)==FALSE) { | |
497 | stop_fdc_drive(pCMD); | |
498 | enable_interrupts(); | |
499 | return FALSE; | |
500 | } | |
501 | retriesrw=0; | |
502 | goto retrycal; | |
503 | } /* else >FDC_CAL_RETRIES */ | |
504 | } | |
505 | else { | |
506 | PRINTF("Read retry %d\n",retriesrw); | |
507 | goto retryrw; | |
508 | } /* else >FDC_RW_RETRIES */ | |
509 | }/* if output */ | |
510 | timeout--; | |
511 | }while(TRUE); | |
512 | } /* for len */ | |
513 | /* the last sector of a track or all data has been read, | |
514 | * we need to get the results */ | |
515 | fdc_terminate(pCMD); | |
516 | offset+=(sect_size*readblk); /* set up buffer pointer */ | |
517 | bufferw=&buffer[offset]; | |
518 | pCMD->blnr+=readblk; /* update current block nr */ | |
519 | blocks-=readblk; /* update blocks */ | |
520 | if(blocks==0) | |
521 | break; /* we are finish */ | |
522 | /* setup new read blocks */ | |
523 | /* readblk=pFG->head*pFG->sect; */ | |
524 | readblk=pFG->sect; | |
525 | if(readblk>blocks) | |
526 | readblk=blocks; | |
527 | retrycal: | |
528 | /* a seek is necessary */ | |
529 | if(fdc_seek(pCMD,pFG)==FALSE) { | |
530 | stop_fdc_drive(pCMD); | |
531 | enable_interrupts(); | |
532 | return FALSE; | |
533 | } | |
534 | if((pCMD->result[STATUS_0]&0x20)!=0x20) { | |
535 | PRINTF("Seek error Status: %02X\n",pCMD->result[STATUS_0]); | |
536 | stop_fdc_drive(pCMD); | |
537 | return FALSE; | |
538 | } | |
539 | pcn=pCMD->result[STATUS_PCN]; /* current track */ | |
540 | }while(TRUE); /* start over */ | |
541 | stop_fdc_drive(pCMD); /* switch off drive */ | |
542 | enable_interrupts(); | |
543 | return TRUE; | |
544 | } | |
545 | ||
546 | /* Scan all drives and check if drive is present and disk is inserted */ | |
547 | int fdc_check_drive(FDC_COMMAND_STRUCT *pCMD, FD_GEO_STRUCT *pFG) | |
548 | { | |
549 | int i,drives,state; | |
550 | /* OK procedure of data book is satisfied. | |
551 | * trying to get some information over the drives */ | |
552 | state=0; /* no drives, no disks */ | |
553 | for(drives=0;drives<4;drives++) { | |
554 | pCMD->drive=drives; | |
555 | select_fdc_drive(pCMD); | |
556 | pCMD->blnr=0; /* set to the 1st block */ | |
557 | if(fdc_recalibrate(pCMD,pFG)==FALSE) | |
7f6c2cbc | 558 | continue; |
3863585b | 559 | if((pCMD->result[STATUS_0]&0x10)==0x10) |
7f6c2cbc | 560 | continue; |
3863585b WD |
561 | /* ok drive connected check for disk */ |
562 | state|=(1<<drives); | |
563 | pCMD->blnr=pFG->size; /* set to the last block */ | |
564 | if(fdc_seek(pCMD,pFG)==FALSE) | |
7f6c2cbc | 565 | continue; |
3863585b WD |
566 | pCMD->blnr=0; /* set to the 1st block */ |
567 | if(fdc_recalibrate(pCMD,pFG)==FALSE) | |
7f6c2cbc | 568 | continue; |
3863585b WD |
569 | pCMD->cmd[COMMAND]=FDC_CMD_READ_ID; |
570 | if(fdc_issue_cmd(pCMD,pFG)==FALSE) | |
7f6c2cbc | 571 | continue; |
3863585b WD |
572 | state|=(0x10<<drives); |
573 | } | |
574 | stop_fdc_drive(pCMD); | |
575 | for(i=0;i<4;i++) { | |
576 | PRINTF("Floppy Drive %d %sconnected %sDisk inserted %s\n",i, | |
577 | ((state&(1<<i))==(1<<i)) ? "":"not ", | |
578 | ((state&(0x10<<i))==(0x10<<i)) ? "":"no ", | |
579 | ((state&(0x10<<i))==(0x10<<i)) ? pFG->name : ""); | |
580 | } | |
581 | pCMD->flags=state; | |
582 | return TRUE; | |
583 | } | |
584 | ||
585 | ||
586 | /************************************************************************** | |
587 | * int fdc_setup | |
588 | * setup the fdc according the datasheet | |
589 | * assuming in PS2 Mode | |
590 | */ | |
591 | int fdc_setup(FDC_COMMAND_STRUCT *pCMD, FD_GEO_STRUCT *pFG) | |
592 | { | |
593 | ||
594 | int i; | |
7f6c2cbc WD |
595 | |
596 | #ifdef CFG_FDC_HW_INIT | |
597 | fdc_hw_init (); | |
598 | #endif | |
3863585b WD |
599 | /* first, we reset the FDC via the DOR */ |
600 | write_fdc_reg(FDC_DOR,0x00); | |
601 | for(i=0; i<255; i++) /* then we wait some time */ | |
602 | udelay(500); | |
603 | /* then, we clear the reset in the DOR */ | |
7f6c2cbc | 604 | pCMD->drive=CFG_FDC_DRIVE_NUMBER; |
3863585b WD |
605 | select_fdc_drive(pCMD); |
606 | /* initialize the CCR */ | |
607 | write_fdc_reg(FDC_CCR,pFG->rate); | |
608 | /* then initialize the DSR */ | |
609 | write_fdc_reg(FDC_DSR,pFG->rate); | |
610 | if(wait_for_fdc_int()==FALSE) { | |
611 | PRINTF("Time Out after writing CCR\n"); | |
612 | return FALSE; | |
613 | } | |
614 | /* now issue sense Interrupt and status command | |
615 | * assuming only one drive present (drive 0) */ | |
616 | pCMD->dma=0; /* we don't use any dma at all */ | |
617 | for(i=0;i<4;i++) { | |
618 | /* issue sense interrupt for all 4 possible drives */ | |
619 | pCMD->cmd[COMMAND]=FDC_CMD_SENSE_INT; | |
620 | if(fdc_issue_cmd(pCMD,pFG)==FALSE) { | |
621 | PRINTF("Sense Interrupt for drive %d failed\n",i); | |
622 | } | |
623 | } | |
624 | /* assuming drive 0 for rest of configuration | |
625 | * issue the configure command */ | |
7f6c2cbc | 626 | pCMD->drive=CFG_FDC_DRIVE_NUMBER; |
3863585b WD |
627 | select_fdc_drive(pCMD); |
628 | pCMD->cmd[COMMAND]=FDC_CMD_CONFIGURE; | |
629 | if(fdc_issue_cmd(pCMD,pFG)==FALSE) { | |
630 | PRINTF(" configure timeout\n"); | |
631 | stop_fdc_drive(pCMD); | |
632 | return FALSE; | |
633 | } | |
634 | /* issue specify command */ | |
635 | pCMD->cmd[COMMAND]=FDC_CMD_SPECIFY; | |
636 | if(fdc_issue_cmd(pCMD,pFG)==FALSE) { | |
637 | PRINTF(" specify timeout\n"); | |
638 | stop_fdc_drive(pCMD); | |
639 | return FALSE; | |
640 | ||
641 | } | |
642 | /* then, we clear the reset in the DOR */ | |
643 | /* fdc_check_drive(pCMD,pFG); */ | |
644 | /* write_fdc_reg(FDC_DOR,0x04); */ | |
645 | return TRUE; | |
646 | } | |
647 | ||
648 | /**************************************************************************** | |
649 | * main routine do_fdcboot | |
650 | */ | |
651 | int do_fdcboot (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[]) | |
652 | { | |
653 | FD_GEO_STRUCT *pFG = (FD_GEO_STRUCT *)floppy_type; | |
654 | FDC_COMMAND_STRUCT *pCMD = &cmd; | |
655 | unsigned long addr,imsize; | |
656 | image_header_t *hdr; /* used for fdc boot */ | |
657 | unsigned char boot_drive; | |
658 | int i,nrofblk; | |
659 | char *ep; | |
660 | int rcode = 0; | |
661 | ||
662 | switch (argc) { | |
663 | case 1: | |
664 | addr = CFG_LOAD_ADDR; | |
7f6c2cbc | 665 | boot_drive=CFG_FDC_DRIVE_NUMBER; |
3863585b WD |
666 | break; |
667 | case 2: | |
668 | addr = simple_strtoul(argv[1], NULL, 16); | |
7f6c2cbc | 669 | boot_drive=CFG_FDC_DRIVE_NUMBER; |
3863585b WD |
670 | break; |
671 | case 3: | |
672 | addr = simple_strtoul(argv[1], NULL, 16); | |
673 | boot_drive=simple_strtoul(argv[2], NULL, 10); | |
674 | break; | |
675 | default: | |
676 | printf ("Usage:\n%s\n", cmdtp->usage); | |
677 | return 1; | |
678 | } | |
679 | /* setup FDC and scan for drives */ | |
680 | if(fdc_setup(pCMD,pFG)==FALSE) { | |
681 | printf("\n** Error in setup FDC **\n"); | |
682 | return 1; | |
683 | } | |
684 | if(fdc_check_drive(pCMD,pFG)==FALSE) { | |
685 | printf("\n** Error in check_drives **\n"); | |
686 | return 1; | |
687 | } | |
688 | if((pCMD->flags&(1<<boot_drive))==0) { | |
689 | /* drive not available */ | |
690 | printf("\n** Drive %d not availabe **\n",boot_drive); | |
691 | return 1; | |
692 | } | |
693 | if((pCMD->flags&(0x10<<boot_drive))==0) { | |
694 | /* no disk inserted */ | |
695 | printf("\n** No disk inserted in drive %d **\n",boot_drive); | |
696 | return 1; | |
697 | } | |
698 | /* ok, we have a valid source */ | |
699 | pCMD->drive=boot_drive; | |
700 | /* read first block */ | |
701 | pCMD->blnr=0; | |
702 | if(fdc_read_data((unsigned char *)addr,1,pCMD,pFG)==FALSE) { | |
703 | printf("\nRead error:"); | |
704 | for(i=0;i<7;i++) | |
705 | printf("result%d: 0x%02X\n",i,pCMD->result[i]); | |
706 | return 1; | |
707 | } | |
708 | hdr = (image_header_t *)addr; | |
709 | if (hdr->ih_magic != IH_MAGIC) { | |
710 | printf ("Bad Magic Number\n"); | |
711 | return 1; | |
712 | } | |
713 | print_image_hdr(hdr); | |
714 | ||
715 | imsize= hdr->ih_size+sizeof(image_header_t); | |
716 | nrofblk=imsize/512; | |
717 | if((imsize%512)>0) | |
718 | nrofblk++; | |
719 | printf("Loading %ld Bytes (%d blocks) at 0x%08lx..\n",imsize,nrofblk,addr); | |
720 | pCMD->blnr=0; | |
721 | if(fdc_read_data((unsigned char *)addr,nrofblk,pCMD,pFG)==FALSE) { | |
722 | /* read image block */ | |
723 | printf("\nRead error:"); | |
724 | for(i=0;i<7;i++) | |
725 | printf("result%d: 0x%02X\n",i,pCMD->result[i]); | |
726 | return 1; | |
727 | } | |
728 | printf("OK %ld Bytes loaded.\n",imsize); | |
729 | ||
730 | flush_cache (addr, imsize); | |
731 | /* Loading ok, update default load address */ | |
732 | ||
733 | load_addr = addr; | |
734 | if(hdr->ih_type == IH_TYPE_KERNEL) { | |
735 | /* Check if we should attempt an auto-start */ | |
736 | if (((ep = getenv("autostart")) != NULL) && (strcmp(ep,"yes") == 0)) { | |
737 | char *local_args[2]; | |
738 | extern int do_bootm (cmd_tbl_t *, int, int, char *[]); | |
739 | ||
740 | local_args[0] = argv[0]; | |
741 | local_args[1] = NULL; | |
742 | ||
743 | printf ("Automatic boot of image at addr 0x%08lX ...\n", addr); | |
744 | ||
745 | do_bootm (cmdtp, 0, 1, local_args); | |
746 | rcode ++; | |
747 | } | |
748 | } | |
749 | return rcode; | |
750 | } | |
751 | ||
752 | ||
753 | ||
754 | #endif /* CONFIG_COMMANDS & CFG_CMD_FDC */ | |
755 | ||
756 |